sanitize channel name
sanitize channel name

Closes https://github.com/ILiedAboutCake/Rustla2/pull/28

ILiedAboutCake/Rustla2,slugalisk/Rustla2,ILiedAboutCake/Rustla2,ILiedAboutCake/Rustla2,slugalisk/Rustla2,slugalisk/Rustla2,ILiedAboutCake/Rustla2,slugalisk/Rustla2